/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.catalina;

import java.util.EventObject;

/**
 * General event for notifying listeners of significant changes on a Container.
 * 
 * @author Craig R. McClanahan
 * @version $Revision: 467222 $ $Date: 2006-10-24 11:17:11 +0800 (星期二, 24 十月
 *          2006) $
 */

public final class ContainerEvent extends EventObject {

	/**
	 * The Container on which this event occurred.
	 */
	private Container container = null;

	/**
	 * The event data associated with this event.
	 */
	private Object data = null;

	/**
	 * The event type this instance represents.
	 */
	private String type = null;

	/**
	 * Construct a new ContainerEvent with the specified parameters.
	 * 
	 * @param container
	 *            Container on which this event occurred
	 * @param type
	 *            Event type
	 * @param data
	 *            Event data
	 */
	public ContainerEvent(Container container, String type, Object data) {

		super(container);
		this.container = container;
		this.type = type;
		this.data = data;

	}

	/**
	 * Return the event data of this event.
	 */
	public Object getData() {

		return (this.data);

	}

	/**
	 * Return the Container on which this event occurred.
	 */
	public Container getContainer() {

		return (this.container);

	}

	/**
	 * Return the event type of this event.
	 */
	public String getType() {

		return (this.type);

	}

	/**
	 * Return a string representation of this event.
	 */
	public String toString() {

		return ("ContainerEvent['" + getContainer() + "','" + getType() + "','"
				+ getData() + "']");

	}

}
